Black Forest Labs' compact FLUX 3 text-to-image model with built-in prompt expansion.
LLM Gateway routes requests to the best providers that are able to handle your prompt size and parameters.
Black Forest Labs' compact FLUX 3 text-to-image model with built-in prompt expansion. You can access it through LLM Gateway's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.
Pricing for FLUX 3 Klein on LLM Gateway starts at $0.00 per million input tokens and $0.00 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.
FLUX 3 Klein is served by fal through LLM Gateway. Requests are automatically routed to the best available provider, with fallback when a provider has issues.
No. FLUX 3 Klein does not currently support tool calling or structured JSON outputs through LLM Gateway.
FLUX 3 Klein was released on October 14, 2026.